ADLINK cPCI-6840 Series Single Board Computer Installation, Configuration, and Maintenance Guide

Application scenario: When there is no PCI bus on the backplane (such as a pure Ethernet switching backplane), JP1 needs to be short circuited to allow the board to operate independently.

2. JP3: Clear CMOS

Normal mode: The jumper cap is placed 1-2.

Clear mode: Move the jumper cap to 2-3 and hold for a few seconds to restore the default BIOS settings.

Operation steps: Power off and unplug the board → Short circuit 2-3 → Restore to 1-2 → Power on again.

3. Micro switch for front panel lower ejector

This switch combines power control and hot plug status notification:

System slot: When the lower ejector is closed, the system is powered on; Trigger the power button signal when turned on.

Peripheral slot: Close the switch when inserted, and the board is powered on; Send an ENOM # interrupt to the system upon opening, notifying a hot pull request.

4. LAN channel selection on RTM (SW1-SW4)

Due to the simultaneous connection of LAN1/LAN2 to J3 (backplane 2.16) and RTM panel RJ-45, they cannot be used simultaneously. By default, all SW1-SX4 are set to ON at the factory, indicating that LAN1/LAN2 will be guided to the rear panel of RTM; If you need to connect to the PICMG 2.16 backplane switch, you need to set all switches to OFF. All switches must remain in the same state (fully ON or fully OFF).

5. VGA Enable on RTM (SW5)

SW5 defaults to all ON and allows rear VGA signal output; If set to OFF, the rear VGA is disabled.

6. CompactFlash Master/Slave Settings (CN9 or CN8)

The CF slot shares the bus with the secondary IDE. By setting CF as Master or Slave (default Slave) through jumper wires, it is necessary to ensure that the master-slave of the two devices on the bus do not conflict.

Hardware installation steps and precautions

1. Installation of CPU and heat sink

The Pentium M processor must be paired with a dedicated heat sink. During installation, it is necessary to evenly apply thermal grease and tighten the heat sink screws in the order shown in the diagram to ensure that the heat sink is in full contact with the CPU core. If using the low-voltage BGA version (OEM), there is no need for users to install it.

2. Memory installation

Only PC2700 (DDR333) ECC registration SO-DIMM is supported, with a maximum capacity of 1 GB per piece (using 512 Mb pellets), and a maximum capacity of 2 GB for two pieces combined. During installation, be careful to prevent accidental gaps and ensure that the module is fully inserted and locked.

3. Hard disk installation

CPCI-6840: Secure the 2.5-inch HDD to the lower PMC position (occupying PMC1) with four screws, and connect the 44 pin IDE cable to CN6.

CPCI-6840V: Install HDD in PMC1 position, but first install HDD bracket and then fix three screws.

RTM installation (cPCI-R6841): Place the HDD on the surface of the RTM component, align the mounting holes, tighten the four screws from the back, and connect the IDE cable.

4. PMC module installation

Both PMC slots (J11/J21) of cPCI-6840 support 64 bit/66 MHz and only support 3.3V or universal voltage (not 5V dedicated modules). Before installation, remove the front panel filler, align the PMC module with the socket and press it in, then fix it with bolts from the bottom of the board. Note: The Jn4 rear I/O on PMC (PMC2) can be connected to J5 (RTM) for SCSI or PIM expansion.

5. Matching RTM with motherboard

Be sure to confirm that the RTM model matches the motherboard (e.g. R6840 provides DVI/SCSI, R6841 provides HDD/CF). Key Warning: Inserting an incompatible RTM may result in circuit damage. Meanwhile, for I/O devices that support both front and rear panels (such as VGA, USB, keyboard and mouse), it is not allowed to use both front and rear connectors at the same time, as this may cause signal conflicts.

6. Insert the entire board into the chassis

First, ensure that the chassis slot is correct (system or peripheral), turn off the ejector and hear a "click" sound. The blue hot swappable LED will light up and wait for it to turn off (indicating stable power supply), then lock the upper and lower ejectors and tighten the fixing screws.

Operating System and Driver Installation Suggestions

Officially supports Windows 2000/XP/Server 2003, Red Hat Linux 9, and VxWorks 5.5. The recommended installation sequence is:

Install Windows system (fresh installation).

Chipset driver: Run cPCI cPCI-6840 Chipset infins_enu.exe from the CD and restart.

VGA driver: Execute VGA win2k_xp142.exe and select a typical installation.

LAN driver: Run LAN PRO2KXP.exe and install Intel PROSet tool.

For Linux and VxWorks BSP, please contact ADLINK to obtain separate support packages.

Programming and Application of Watchdog Timer (WDT)

WDT is integrated into the 6300ESB South Bridge and provides two-level timeout protection, which is a key mechanism for embedded systems to achieve self recovery. Its core features:

35 bit down counter with a resolution of 1 μ s to 10 minutes.

The first level timeout triggers IRQ (or SMI, but this board does not support SMI), and the second level timeout drives the WDT_TOUT # pin reset system.

Supports WDT mode (two-level) and free running mode (level only, automatic reload).